1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 651ASchedule 40 and 80 HighDensity Polyethylene (HDPE)ConduitUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NO
2、T AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL Standard for Safety for Schedule 40 and 80 High Density Polyethylene (HDPE) Conduit, UL 651AFifth Edition, Dated October 26, 2011Summary of TopicsThe following changes in requirements are being issued:1. New Fifth Edit
3、ion of UL 651A, Schedule 40 and 80 High Density Polyethylene (HDPE)Conduit, which includes the removal of requirements for underground PVC conduit andaddition of requirements for 10-foot and continuous lengths of underground HDPEconduitText that has been changed in any manner or impacted by ULs elec
4、tronic publishing system is markedwith a vertical line in the margin.The new requirements are substantially in accordance with Proposal(s) on this subject dated June 3,2011.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, ortransmitted in any form by
5、any means, electronic, mechanical photocopying, recording, or otherwisewithout prior permission of UL.UL provides this Standard as is without warranty of any kind, either expressed or implied, including butnot limited to, the implied warranties of merchantability or fitness for any purpose.In no eve
6、nt will UL be liable for any special, incidental, consequential, indirect or similar damages,including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or theinability to use this Standard, even if UL or an authorized UL representative has been advised of t
7、hepossibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid forthis Standard, regardless of the form of the claim.Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold ULharmless from and against any loss, expens
8、e, liability, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.The requirements in this Standard are now in effect, except for those paragraphs, sections
9、, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the note following theaffected item. The prior text for requirements that have been revised and that have a future effective dateare located after the Standard, and are preceded by a SUPERSEDED REQU
10、IREMENTS notice.OCTOBER 26, 2011 UL 651A tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 26, 2011 UL 651Atr2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM U
11、LOCTOBER 26, 20111UL 651ASchedule 40 and 80 High Density Polyethylene (HDPE) ConduitPrior to the first edition, the requirements for the products covered by thisstandard were included in the Standard for Rigid Nonmetallic Conduit, UL 651.Prior to the fifth edition, the requirements for continuous le
12、ngth HDPE conduitcovered by this standard were included in the Standard for Continuous LengthHDPE Conduit, UL 651B.First Edition May, 1981Second Edition August, 1989Third Edition August, 1995Fourth Edition October, 2000Fifth EditionOctober 26, 2011This ANSI/UL Standard for Safety consists of the Fif
13、th Edition.The most recent designation of ANSI/UL 651A as an American National Standard(ANSI) occurred on October 26, 2011. ANSI approval for a standard does notinclude the Cover Page, Transmittal Pages, Title Page, or effective dateinformation.The Department of Defense (DoD) has adopted UL 651A on
14、November 30, 1984.The publication of revised pages or a new edition of this Standard will notinvalidate the DoD adoption.Comments or proposals for revisions on any part of the Standard may besubmitted to UL at any time. Proposals should be submitted via a ProposalRequest in ULs On-Line Collaborative
15、 Standards Development System (CSDS)at http:/.ULs Standards for Safety are copyrighted by UL. Neither a printed nor electroniccopy of a Standard should be altered in any way. All of ULs Standards and allcopyrights, ownerships, and rights regarding those Standards shall remain thesole and exclusive p
16、roperty of UL.COPYRIGHT 2011 UNDERWRITERS LABORATORIES INC.ANSI/UL 651A-2011UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 26, 2011UL 651A2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUT
17、ION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 General 42.1 Units of measurement .42.2 Undated references .5CONSTRUCTION3 General 54 Straight Conduit 65 Dimensions 96 Straight Conduit and Fittings Other Than Elbows 107 Elbows Made from Straight Conduit 128 Schedule 40, 80, and EPEC-A
18、and -B Coilable Conduit 13PERFORMANCE9 All Conduit Types 139.1 General 139.2 Deflection under heat and load 149.3 Low-temperature handling test 199.4 Identification of conduit .209.5 Resistance to impact .209.6 Resistance to crushing .2110 Straight Conduit 2210.1 Tensile Strength .2210.2 Dimensional
19、 stability and crushing strength of straight couplings .2510.3 Bending test of joints .2610.4 Axial-pull test on joints 2710.5 Water absorption .2811 Schedule 40 and 80 and EPEC-A and -B Coilable Conduit 2811.1 Tensile strength test 2811.2 Moisture penetration test 2911.3 Water absorption .29MARKING
20、S12 Details .29OCTOBER 26, 2011 UL 651A 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover straight conduit and coilable, smooth-wall, continuous length conduit witha circular cross section:a) Extr
21、uded straight rigid Schedule 40 high density PE (polyethylene) electrical conduit and thefollowing fittings for use with this conduit type:1) Elbows and2) Rigid high density PE couplings.b) Schedule 40, Schedule 80, EPEC-A, and EPEC-B coilable, smooth-wall continuous lengthhigh density PE electrical
22、 conduit.1.2 The conduit and fittings mentioned in 1.1 are intended for use at 50C (122F) and lower ambienttemperatures. Extruded straight rigid Schedule 40 conduit and fittings, where directly buried or encased inconcrete in trenches outside of buildings, may be used with 90C (194F) wiring.1.3 The
23、conduit and fittings covered in these requirements are intended for use as rigid nonmetallicraceway for wires and cables in accordance with the National Electrical Code, NFPA 70.1.4 Extruded straight rigid Schedule 40, Schedule 40, Schedule 80, EPEC-A, and EPEC-B coilableconduit is for aboveground u
24、se where encased in not less than 2 inches (50 mm) of concrete and forunderground use by direct burial or encasement in concrete.2 General2.1 Units of measurement2.1.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.OCTOBER 26, 2
25、011UL 651A4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2.2 Undated references2.2.1 Any undated reference to a code or standard appearing in the requirements of this standard shallbe interpreted as referring to the latest edition of that co
26、de or standard.CONSTRUCTION3 General3.1 All conduit and fittings shall be made and furnished with the degree of uniformity and quality ofworkmanship that are practicable in a well-equipped factory. The following materials shall be used asspecified in the Standard Specification for Polyethylene Plast
27、ics Pipe and Fittings Materials, ASTM D3350:a) For straight rigid conduit and couplings and other fittings the material compound equal orexceed the cell classification PE 33662OC;b) For Schedule 40, Schedule 80, EPEC-A, and EPEC-B coilable conduit, the compoundmaterial shall equal or exceed the cell
28、 classification PE334420C or E.3.2 Conduit shall be essentially circular in cross section. The inside surface of conduit shall be withoutindentations (normal convolutions are not to be considered as indentations), projections, roughness, orother features that could damage or impede wires and cables
29、being pulled into the conduit.3.3 Conduit and fittings shall provide a smooth raceway for the pulling in of wires and cables. They shallnot have any features that can abrade or otherwise damage wires and cables. The outside surfaces ofconduit and fittings shall be smooth and without any chips, blist
30、er, cracks, or other defects. There shallnot be any tendency for conduit or fittings to peel, scale, flake chalk, or crumble.3.4 Both ends of each length of conduit shall be perpendicular to the longitudinal axis of the conduit.3.5 Each length of conduit on which measurements are made is to be finis
31、hed, smooth and cleanwherever it is to touch any part of a measuring device or tool. While measurements are being made, theconduit and the air around it are to be in thermal equilibrium with one another at a temperature of 23.02.0C (73.4 3.6F). All of the average and individual outside diameter meas
32、urements are to beperformed at the center and at least one end of the conduit.OCTOBER 26, 2011 UL 651A 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4 Straight Conduit4.1 The measurements from which the average outside diameters of a length
33、 of finished straight conduitare to be determined for comparison with the limits specified in inches in Table 4.1 or in millimeters inTable 4.2 are to be made by means of a:a) Machinists micrometer caliper that has a flat-ended spindle, a flat anvil and is calibrated toread directly to at least 0.00
34、1 inch or 0.01 mm;b) Vernier caliper calibrated to read directly to at least 0.001 inch or 0.01 mm;c) Vernier wrap tape, calibrated to read directly to at least 0.001 inch or 0.01 mm;d) Tapered sleeve gauge accurate to 1 percent of its taper and 0.001 inch (0.01 mm) of itsdiameter; ore) Sleeve windo
35、w gauge accurate to within 1 percent of its tape and 0.001 inch (0.01 mm)of its diameter.Table 4.1Outside diameter and wall thickness of conduit in inchesTrade size Average Outside diameters Wall thicknessesMax Min Max Min1/2 0.840 0.004 0.855 0.8562 0.129 0.1093/4 1.050 0.004 1.070 1.030 0.133 0.11
36、31 1.315 0.005 1.340 1.290 0.153 0.1331-1/4 1.660 0.005 1.685 1.635 0.160 0.1401-1/2 1.900 0.006 1.930 1.870 0.165 0.1452 2.375 0.006 2.410 2.340 0.174 0.1542-1/2 2.875 0.007 2.910 2.840 0.227 0.2033 3.500 0.008 3.540 3.460 0.242 0.2163-1/2 4.000 0.008 4.045 3.955 0.253 0.2264 4.500 0.009 4.550 4.45
37、0 0.265 0.2375 5.563 0.010 5.618 5.508 0.289 0.2586 6.625 0.011 6.690 6.560 0.314 0.280OCTOBER 26, 2011UL 651A6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 4.2Limits on outside diameters and wall thicknesses of conduit in millimetersM
38、etric designator Average Outside diameters Wall thicknessesMaximum Minimum Maximum Minimum16 21.34 0.10 21.72 20.96 3.28 2.7721 26.67 0.10 27.18 26.16 3.38 2.8727 33.40 0.13 34.04 32.77 3.89 3.3835 42.16 0.13 42.80 41.53 4.06 3.5641 48.26 0.15 49.02 47.50 4.20 4.6853 60.32 0.15 61.21 59.44 4.42 3.91
39、63 73.02 0.18 73.91 72.14 5.57 5.1678 88.90 0.20 89.92 87.88 6.15 5.4991 101.60 0.20 102.74 100.46 6.43 5.74103 114.30 0.23 115.57 113.03 6.73 6.02129 141.30 0.25 142.70 139.90 7.34 6.55155 168.28 0.28 169.93 166.62 7.98 7.114.2 In disputes that may arise between measuring techniques, the vernier wr
40、ap tape is to act as thereferee in determining compliance with the requirements for average outside diameters.4.3 When employing a tapered sleeve gauge, the entrance and exit diameters of the gauge shallcorrespond to the maximum and minimum outside diameters for the trade size of conduit being measu
41、red.4.4 When employing a sleeve window gauge, the window shall extend beyond the two scribed markswhich shall represent the minimum and maximum permitted diameters.4.5 The measurements from which the minimum and maximum outside diameters (ovality orout-of-roundness) of a length of finished conduit a
42、re to be determined for comparison with the limitsspecified in inches in Table 4.1 or in millimeters in Table 4.2 are to be made by means of a:a) Machinists micrometer caliper that has a flat-ended spindle, a flat anvil, and is calibrated toread directly to at least 0.001 inch or 0.01 mm;b) Vernier
43、caliper calibrated to read directly to at least 0.001 inch or 0.01 mm; orc) Out-of-roundness gauge accurate to 0.001 inch or 0.01 mm.4.6 In disputes that may arise between measuring techniques, the vernier caliper is to act as the refereein determining compliance with the requirements for minimum an
44、d maximum outside diameters.4.7 The measurements from which the wall thicknesses of a length of finished conduit are to bedetermined for comparison with the limits specified in inches in Table 4.1, or in millimeters in Table 4.2,are to be made by means of a machinists micrometer caliper that has a r
45、atchet, a flat-ended spindle, anda hemispherical anvil and is calibrated to read directly to at least 0.001 inches or 0.01 mm.OCTOBER 26, 2011 UL 651A 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4.8 If desired, equivalent methods, tools,
46、and measurement techniques may be employed to determinecompliance with the above dimensional requirements provided they are accurate to within 0.001 inch(0.01 mm).4.9 To determine the average outside diameter when using a micrometer caliper or vernier caliper, atleast four measurements (every 45 deg
47、rees) are necessary at each place to make certain that the largestand smallest diameters are found. The average of all the recorded diameters is to be determined andcompared with the average diameter in inches in Table 4.1 or in millimeters in Table 4.2 for the trade sizeof conduit involved. The ave
48、rage of the recorded diameters shall not differ from the average diameter inthe applicable table by more than the specified tolerances.4.10 To determine the average outside diameter when using vernier wrap tape, place the vernier wraptape around the conduit making sure that it is at right angles to
49、the conduit axis and is flat against theconduit surface. The observed reading is to be compared with the average diameter in inches in Table4.1 or in millimeters in Table 4.2 for the trade size of conduit involved. The observed reading shall notdiffer from the average diameter in the applicable table by more than the specified tolerances.4.11 To determine the average outside diameter when using a tapered sleeve gauge or sleeve windowgauge, cut the end of the conduit square and remove burrs. Insert th
